Home / 12,221.20-18,331.80-10,301.20

Finding the Fourth Proportional to 12,221.20, 18,331.80 and 10,301.20

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Solution

The fourth proportional to 12,221.20, 18,331.80 and 10,301.20 is: 15,451.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.20 : 18,331.80 = 10,301.20 : x
  2. Step 2: Convert to fraction form
    12,221.20/18,331.80 = 10,301.20/x
  3. Step 3: Cross multiply
    12,221.20x = 18,331.80 × 10,301.20
  4. Step 4: Simplify right side
    12,221.20x = 188,839,538.16
  5. Step 5: Solve for x
    x = 188,839,538.16/12,221.20
  6. Step 6: Final answer
    x = 15,451.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.